JP2023157224A - Display - Google Patents

Abstract

To provide a display that can achieve both higher contrast of an image and prevention of output of an image in which unintended leakage of light seems to occur on an outer edge and its periphery.SOLUTION: A display 1 comprises: a display panel 30 that includes a plurality of pixels; a lighting control panel 80 that includes a plurality of pixels for lighting control; and a light source device 50 that radiates light. When a high luminance range WA occurs and a predetermined condition is established, a blurring range BWA1 is formed, and the light from the light source device 50 is transmitted through the blurring range BWA1 and the high luminance range WA and emitted from the other face of the display panel 30. When the predetermined condition is not established, the blurring range is not formed and a non-blurring range BWA3 is formed, and the light from the light source device 50 is transmitted through the non-blurring range BWA3 and the high luminance range WA and emitted from the other face of the display panel 30. When the high luminance range WA is separated from an outer edge Ed by a predetermined distance or more, the predetermined condition is established.SELECTED DRAWING: Figure 10

Description

The present disclosure relates to a display device.

A configuration is known in which a light control panel is provided between a liquid crystal display panel and a light source to further enhance the contrast of an image (for example, Patent Document 1).

International Publication No. 2019/225137

By making the range through which light is transmitted by the dimming panel wider than the range of pixels that are controlled to transmit light on the liquid crystal display panel, it is possible to achieve good image quality regardless of the position from which the user views the image, such as from an oblique viewpoint. Images can be visually recognized with their image quality. However, if the range through which light is transmitted by the dimming panel is unconditionally wider than the range of pixels controlled to transmit light on the liquid crystal display panel at and around the outer edge of the display panel, unintended light leakage may occur. An image that appears to be occurring at or near the outer edge may be output.

The present disclosure has been made in view of the above-mentioned problems, and provides a display device that can achieve both higher image contrast and suppression of output of an image that appears to have unintended light leakage occurring at and near the outer edge. The purpose is to provide

A display device according to one aspect of the present disclosure includes: a display panel including a plurality of pixels; a dimming panel disposed to face the display panel on one side of the display panel and including a plurality of dimming pixels; a light source that irradiates light directed from the dimming panel side toward the display panel side, and the pixel is controlled to turn on in white according to an input image signal, and when a predetermined condition is satisfied. , a blurring process is applied such that a plurality of the dimming pixels transmit light, a blurring range is formed that includes the plurality of dimming pixels to which the blurring process is applied, and the light source is The light passes through the blurred range and the pixel and is emitted to the other side of the display panel, and the pixel is controlled to turn on in white according to the input image signal, and the predetermined condition is met. is not established, the blurred range is not formed, and the dimming pixel located at a position overlapping with the pixel on a straight line along a direction in which the display panel and the dimming panel face each other is controlled to transmit light. , the pixel that is controlled so that the light from the light source passes through the dimming pixel and the pixel and is emitted to the other side of the display panel, and lights up in white, is one of the plurality of pixels in the display panel. The predetermined condition is satisfied when the distance is a predetermined distance or more from the outer edge of the display area where the display area is provided.

FIG. 1 is a diagram showing an example of the main configuration of a display device according to an embodiment. FIG. 2 is a diagram showing the positional relationship among a display panel, a light control panel, and a light source device. FIG. 3 is a diagram showing an example of a pixel arrangement of an image display panel. FIG. 4 is a cross-sectional view showing an example of a schematic cross-sectional structure of an image display panel. FIG. 5 is a diagram illustrating the principle and example of the occurrence of double images and image loss. Figure 6 shows the distance from the dimming pixel, which is treated as the center coordinate determined based on the coordinates of the pixel that is controlled to transmit light at the highest gradation, and the distance from the dimming pixel that is controlled to transmit light by blur processing. It is a graph which shows an example of the relationship between degree and. FIG. 7 is a diagram illustrating an example of display output contents based on input signals to the display device. FIG. 8 is a diagram showing a light transmission range by a light control panel to which blurring processing is applied based on the display output contents shown in FIG. 7. FIG. 9 is a schematic diagram showing the operation of a display device in a comparative example in which blurring processing is applied unconditionally. FIG. 10 is a schematic diagram showing an example of the operation of the display device in the embodiment. FIG. 11 is a schematic diagram showing an image visually recognized when the high-luminance range and its vicinity are viewed from each of the viewpoints shown in FIGS. 9 and 10. FIG. 12 is a schematic diagram showing an enlarged partial range shown in the "P1" column of FIG. 11 and the "P3" column in the "Comparative Example". FIG. 13 is a schematic diagram showing an enlarged partial range shown in the "P4" column in "Comparative Example" in FIG. 11. FIG. 14 is a schematic diagram showing an enlarged partial range shown in the column "P3" in "Embodiment" in FIG. FIG. 15 is a schematic diagram showing an enlarged partial range shown in the "P4" column in "Embodiment" in FIG. FIG. 16 is a schematic diagram showing an example of the relationship between the position of the user's viewpoint and the imaging range AoV of the imaging device when blurring processing is applied to the edge of the screen and its vicinity in the embodiment. FIG. 17 is a schematic diagram illustrating an example of the relationship between the position of the user's viewpoint and the imaging range AoV of the imaging device when the blurring process is not applied to the edge of the screen and its vicinity in the embodiment. FIG. 18 is a block diagram showing an example of the functional configuration of the signal processing section. FIG. 19 is a block diagram showing an example of the functional configuration of the blurring processing section. FIG. 20 is a flowchart showing the flow of processing by the 2d filter.

Each embodiment of the present disclosure will be described below with reference to the drawings. Note that the disclosure is merely an example, and any modifications that can be easily made by those skilled in the art while maintaining the spirit of the invention are naturally included within the scope of the present disclosure. In addition, in order to make the explanation more clear, the drawings may schematically represent the width, thickness, shape, etc. of each part compared to the actual aspect, but these are only examples, and the interpretation of this disclosure will be limited. It is not limited. In addition, in this specification and each figure, the same elements as those described above with respect to the previously shown figures are denoted by the same reference numerals, and detailed explanations may be omitted as appropriate.

FIG. 1 is a diagram showing an example of the main configuration of a display device 1 according to an embodiment. The display device 1 of the embodiment includes a signal processing section 10, a display section 20, a light source device 50, a light source control circuit 60, a light control section 70, and an imaging device 90. The signal processing section 10 performs various outputs based on the input signal IP input from the external control device 2, and controls the operations of the display section 20, the light source device 50, and the light control section 70. The signal processing unit 10 may be, for example, a single integrated circuit having a function of performing such control, or may have a configuration in which a plurality of circuits are combined to realize such a function. The input signal IP is a signal that functions as data for displaying and outputting an image on the display device 1, and is, for example, an RGB image signal. Input signal IP corresponds to the resolution of display panel 30. That is, the input signal IP includes pixel signals corresponding to the number of pixels 48 of the display panel 30 and the arrangement in the X direction and the Y direction, which will be described later. The signal processing section 10 outputs an output image signal OP generated based on the input signal IP to the display section 20. Further, the signal processing unit 10 outputs the dimming signal DI generated based on the input signal IP to the dimming unit 70. Moreover, when the input signal IP is input, the signal processing unit 10 outputs a light source drive signal BL for controlling lighting of the light source device 50 to the light source control circuit 60. The light source control circuit 60 is, for example, a driver circuit for the light source device 50, and operates the light source device 50 according to the light source drive signal BL. The light source device 50 has a light source that emits light from a light emitting area LA. In the embodiment, the light source control circuit 60 operates the light source device 50 so that a constant amount of light is emitted from the light emitting area LA of the light source device 50 in accordance with the display timing of the frame image.

The display section 20 includes a display panel 30 and a display panel drive section 40. The display panel 30 has a display area OA in which a plurality of pixels 48 are provided. The plurality of pixels 48 are arranged, for example, in a matrix. The display panel 30 of the embodiment is a liquid crystal image display panel. The display panel drive section 40 includes a signal output circuit 41 and a scanning circuit 42. The signal output circuit 41 is a circuit that functions as a so-called source driver, and drives a plurality of pixels 48 according to the output image signal OP. The scanning circuit 42 is a circuit that functions as a so-called gate driver, and outputs a drive signal for scanning a plurality of pixels 48 arranged in a matrix in units of a predetermined row (for example, one row). The pixel 48 is driven to output a tone value according to the output image signal OP at the timing when the drive signal is output.

The light control unit 70 adjusts the amount of light emitted from the light source device 50 and output through the display area OA. The light control section 70 includes a light control panel 80 and a light control panel drive section 140. The light control panel 80 has a light control area DA in which the light transmittance can be changed. The dimming area DA is arranged at a position overlapping the display area OA from the front viewpoint. The dimming area DA covers the entire display area OA from the front viewpoint. The light emitting area LA covers the entire display area OA and the entire dimming area DA from a front viewpoint. Note that the front viewpoint is a viewpoint that views the XY plane from the front.

FIG. 2 is a diagram showing the positional relationship among the display panel 30, the light control panel 80, and the light source device 50. In the embodiment, as illustrated in FIG. 2, a display panel 30, a light control panel 80, and a light source device 50 are stacked. Specifically, the light control panel 80 is laminated on the irradiation surface side from which light is output from the light source device 50. Further, the display panel 30 is stacked on the opposite side of the light source device 50 with the light control panel 80 interposed therebetween. The amount of light emitted from the light source device 50 is adjusted in the dimming area DA of the dimming panel 80 and illuminates the display panel 30 . The display panel 30 is illuminated from the back side where the light source device 50 is located, and displays and outputs an image on the opposite side (display surface side). In this way, the light source device 50 functions as a backlight that illuminates the display area OA of the display panel 30 from the back. Further, in the embodiment, the light control panel 80 is provided between the display panel 30 and the light source device 50. Hereinafter, the direction in which the display panel 30, the light control panel 80, and the light source device 50 are stacked will be referred to as the Z direction. Further, two directions orthogonal to the Z direction are defined as an X direction and a Y direction. The X direction and the Y direction are orthogonal. The plurality of pixels 48 are arranged in a matrix along the X direction and the Y direction. Specifically, the number of pixels 48 lined up in the X direction is h, and the number of pixels 48 lined up in the Y direction is v. h and v are natural numbers of 2 or more.

Note that a first polarizing plate (Polarizer) Po1 is provided on the back side of the light control panel 80. A second polarizing plate Po2 is provided on the display surface side of the light control panel 80. Further, a third polarizing plate Po3 is provided on the back side of the display panel 30. A fourth polarizing plate Po4 is provided on the display surface side of the display panel 30. Further, a diffusion layer Po5 is provided between the second polarizing plate Po2 and the third polarizing plate Po3. The first polarizing plate Po1, the second polarizing plate Po2, the third polarizing plate Po3, and the fourth polarizing plate Po4 each allow polarized light in a specific direction to pass through, and do not allow polarized light in other directions to pass through. The polarization direction of the polarized light that the first polarizing plate Po1 passes and the polarization direction of the polarized light that the second polarizing plate Po2 passes are orthogonal. The polarization direction of the polarized light that the second polarizing plate Po2 passes is the same as the polarization direction of the polarized light that the third polarizing plate Po3 passes. The polarization direction of the polarized light that the third polarizing plate Po3 passes and the polarization direction of the polarized light that the fourth polarizing plate Po4 passes are orthogonal. The diffusion layer Po5 diffuses the incident light and emits it. Note that since the polarization directions of the second polarizing plate Po2 and the third polarizing plate Po3 are the same, a configuration may be adopted in which either one is deleted. In this case, an improvement in transmittance can be expected. When both the second polarizing plate Po2 and the third polarizing plate Po3 are provided, the contrast can be improved compared to the case of only one. In addition, when either the second polarizing plate Po2 or the third polarizing plate Po3 is omitted, it is possible to expect the effect of improving contrast by limiting the polarization direction of the light diffused by the diffusion layer Po5 by the third polarizing plate Po3. From this point of view, it is desirable to omit the second polarizing plate Po2.

FIG. 3 is a diagram showing an example of a pixel arrangement of the display panel 30. As illustrated in FIG. 3, the pixel 48 includes, for example, a first sub-pixel 49R, a second sub-pixel 49G, and a third sub-pixel 49B. The first sub-pixel 49R displays the first primary color (for example, red). The second sub-pixel 49G displays the second primary color (for example, green). The third sub-pixel 49B displays a third primary color (for example, blue). In this way, the pixels 48 arranged in a matrix on the display panel 30 include a first sub-pixel 49R that displays the first color, a second sub-pixel 49G that displays the second color, and a third sub-pixel 49G that displays the third color. A third sub-pixel 49B is included. The first color, second color, and third color are not limited to the first primary color, second primary color, and third primary color, and may be different colors such as complementary colors. In the following description, the first sub-pixel 49R, the second sub-pixel 49G, and the third sub-pixel 49B are referred to as a sub-pixel 49 when there is no need to distinguish them from each other.

The pixel 48 may further include a sub-pixel 49 in addition to the first sub-pixel 49R, the second sub-pixel 49G, and the third sub-pixel 49B. For example, pixel 48 may have a fourth subpixel that displays a fourth color. The fourth subpixel displays a fourth color (eg, white). When the fourth sub-pixel is illuminated with the same light source lighting amount, the first sub-pixel 49R displays the first color, the second sub-pixel 49G displays the second color, and the fourth sub-pixel 49G displays the third color. It is preferable that it be brighter than the third sub-pixel 49B.

More specifically, the display device 1 is a transmissive color liquid crystal display device. As illustrated in FIG. 3, the display panel 30 is a color liquid crystal display panel, and a first color filter that allows the first primary color to pass is arranged between the first sub-pixel 49R and the image viewer, and a second sub-pixel A second color filter that passes the second primary color is arranged between the pixel 49G and the image viewer, and a third color filter that passes the third primary color is arranged between the third subpixel 49B and the image viewer. ing. The first color filter, the second color filter, and the third color filter are included in a filter film 26, which will be described later.

Note that when the fourth subpixel is provided, no color filter is disposed between the fourth subpixel and the image viewer. In this case, a large step will occur in the fourth sub-pixel. Therefore, the fourth subpixel may be provided with a transparent resin layer instead of the color filter. Thereby, it is possible to suppress the occurrence of a large step in the fourth sub-pixel.

The signal output circuit 41 is electrically connected to the display panel 30 by a signal line DTL. The display panel drive section 40 selects a subpixel 49 in the display panel 30 using a scanning circuit 42, and selects a switching element (for example, a thin film transistor (TFT)) for controlling the operation (light transmittance) of the subpixel 49. )) is controlled on and off. The scanning circuit 42 is electrically connected to the display panel 30 by a scanning line SCL.

In the embodiment, the plurality of signal lines DTL are lined up in the X direction. Each signal line DTL extends in the Y direction. The plurality of scanning lines SCL are arranged in the Y direction. Each scan line SCL extends in the X direction. Therefore, in the embodiment, the pixels 48 are driven in units of pixel columns (lines) including a plurality of pixels 48 lined up in the X direction so as to share the scanning line SCL, in accordance with the drive signal output from the scanning circuit 42. . Hereinafter, when simply written as a line, it refers to a pixel column including a plurality of pixels 48 lined up in the X direction so as to share the scanning line SCL.

The direction along the extending direction of each scanning line SCL is defined as a horizontal scanning direction. Further, the direction in which the plurality of scanning lines SCL are arranged is referred to as a vertical scanning direction. In the embodiment, the X direction corresponds to the horizontal scanning direction, and the Y direction corresponds to the vertical scanning direction.

FIG. 4 is a cross-sectional view showing an example of a schematic cross-sectional structure of the display panel 30. As shown in FIG. The array substrate 30a includes a filter film 26 provided above the pixel substrate 21 such as a glass substrate, a counter electrode 23 provided above the filter film 26, and an insulating film provided in contact with the counter electrode 23. 24, a pixel electrode 22 on an insulating film 24, and a first alignment film 28 provided on the uppermost surface side of the array substrate 30a. The counter substrate 30b includes a counter pixel substrate 31 such as a glass substrate, a second alignment film 38 provided on the lower surface of the counter pixel substrate 31, and a polarizing plate 35 provided on the upper surface. The array substrate 30a and the counter substrate 30b are fixed via a seal portion 29. A liquid crystal layer LC1 is sealed in a space surrounded by the array substrate 30a, the counter substrate 30b, and the seal portion 29. The liquid crystal layer LC1 includes liquid crystal molecules whose alignment direction changes depending on the applied electric field. The liquid crystal layer LC1 modulates the light that passes through the liquid crystal layer LC1 depending on the state of the electric field. The direction of the liquid crystal molecules in the liquid crystal layer LC1 changes depending on the electric field applied between the pixel electrode 22 and the counter electrode 23, and the amount of light transmitted through the display panel 30 changes. Each of the plurality of subpixels 49 has a pixel electrode 22. A plurality of switching elements for individually controlling the operation (light transmittance) of the plurality of sub-pixels 49 are electrically connected to the pixel electrode 22.

The light control section 70 includes a light control panel 80 and a light control panel drive section 140. The light control panel 80 of the embodiment has the same configuration as the display panel 30 shown in FIG. 4 except that the filter film 26 is omitted. Therefore, unlike the pixel 48 (see FIG. 3), which includes a first sub-pixel 49R, a second sub-pixel 49G, and a third sub-pixel 49B, which are distinguished by the color of the color filter, the light control panel 80 is provided with a color filter. (See FIG. 1). That is, the light control panel 80 is a monochrome liquid crystal panel.

The signal output circuit 141 and the scanning circuit 142 included in the light control panel drive section 140 have the same configuration as the display panel drive section 40, except that the object to be connected is the light control panel 80. The signal line ADTL between the dimming panel 80 and the dimming panel driving section 140 shown in FIG. 1 has the same configuration as the signal line DTL described with reference to FIG. 3. The scanning line ASCL between the dimming panel 80 and the dimming panel driving section 140 shown in FIG. 1 has the same configuration as the scanning line SCL described with reference to FIG. 3. However, the size of the range controlled as one dimming pixel 148 on the dimming panel 80 includes a plurality of pixels 48 from the front viewpoint. In the description of the embodiment, the width in the X direction that is controlled as one dimming pixel 148 corresponds to the width of one pixel 48 arranged in the X direction. In other words, the width in the X direction controlled as one dimming pixel 148 corresponds to the width of the three sub-pixels 49 arranged in the X direction. Further, the width in the Y direction that is controlled as one dimming pixel 148 corresponds to the width of one pixel 48 lined up in the Y direction. Note that the number of pixels 48 in the range controlled as one dimming pixel 148 illustrated here is just an example, and is not limited to this, and can be changed as appropriate. For example, h1×v1 pixels 48, h1 in the X direction and v1 in the Y direction, may be arranged in a range controlled as one dimming pixel 148. h1 and v1 are arbitrary natural numbers.

In the light control panel 80, one pixel electrode 22 may be provided in a range controlled as one light control pixel 148, or a plurality of pixel electrodes 22 may be provided. When a plurality of pixel electrodes 22 are provided in a range controlled as one dimming pixel 148, the plurality of pixel electrodes 22 are controlled to have the same potential. This allows the plurality of pixel electrodes 22 to behave substantially in the same way as one pixel electrode 22.

In the embodiment, the arrangement of the plurality of pixels 48 in the display area OA and the arrangement of the plurality of dimming pixels 148 in the dimming area DA are the same. Therefore, in the embodiment, the number of pixels 48 aligned in the X direction of the display area OA is the same as the number of dimming pixels 148 aligned in the X direction of the dimming area DA. Further, in the embodiment, the number of pixels 48 lined up in the Y direction in the display area OA is the same as the number of dimming pixels 148 lined up in the Y direction in the dimming area DA. Further, in the embodiment, the display area OA and the dimming area DA overlap from the front viewpoint. Further, the Z direction corresponds to the optical axis LL of light emitted from the light emitting area LA of the light source device 50. Therefore, one of the plurality of pixels 48 and one dimming pixel 148 located at a position overlapping with the pixel 48 from the front viewpoint share the optical axis LL. However, the light emitted from the light emitting area LA is incoherent light that is radially diffused. Therefore, light rays in a direction not along the optical axis LL may also enter the dimming pixel 148 and the pixel 48.

The light emitted from the light source device 50 enters the light control panel 80 via the first polarizing plate Po1. Of the light that has entered the light control panel 80, the light that has passed through the light control pixels 148 enters the display panel 30 through the second polarizing plate Po2, the diffusion layer Po5, and the third polarizing plate Po3. Of the light that has entered the display panel 30, the light that has passed through the pixel 48 is output via the fourth polarizing plate Po4. Based on the light output in this way, the user of the display device 1 visually recognizes the image output from the display device 1. Note that the user is a person who visually recognizes an image output by the display device 1, such as a user H shown in FIG. 10, which will be described later.

If we limit our thinking to the case where an image is viewed from the front with respect to the board surface (XY plane) of the display device 1, the pixels that are controlled to transmit light in order to display the image on the display panel 30 If the dimming pixel 148 that shares the optical axis LL with the display device 48 is controlled to transmit light, it is considered that the user of the display device 1 can visually recognize the image output by the display device 1 without any problem. In this case, the dimming pixel 148 that shares the optical axis LL with the pixel 48 controlled not to transmit light in the display panel 30 is controlled not to transmit light. On the other hand, the user of the display device 1 does not necessarily view the image from directly in front of the board surface (XY plane) of the display device 1. When the pixels 48 and the dimming pixels 148 are controlled in the same way as when viewing an image from the front on the board surface (XY plane) of the display device 1 described above, the pixels intersecting the board surface and the Z direction are A user who views the fourth polarizing plate Po4 side of the display device 1 from this angle (a perspective angle) may view a double image or a chipped image.

FIG. 5 is a diagram illustrating the principle and example of the occurrence of double images and image loss. In FIG. 5, a "schematic panel diagram" shows a schematic stage diagram of the display device 1. In the schematic cross-sectional view, the pixels 48 whose liquid crystal orientation is controlled to transmit light and the dimming pixels 148 are shown as white rectangles. Further, in the schematic cross-sectional view, a set of a plurality of pixels 48 whose liquid crystal alignment is controlled so as not to transmit light is shown as a light shielding portion 48D in a rectangular dot pattern. Further, in the schematic cross-sectional view, a set of a plurality of dimming pixels 148 whose liquid crystal alignment is controlled so as not to transmit light is shown as a light shielding portion 148D in a rectangular dot pattern.

Light that passes through the dimming pixel 148, passes through the laminated structure (second polarizing plate Po2, diffusion layer Po5, third polarizing plate Po3) between the dimming pixel 148 and the pixel 48, and passes through the pixel 48. When the light is emitted from the output surface side of the display panel 30 through the fourth polarizing plate Po4 (see FIG. 2), not shown, refraction occurs due to the difference in refractive index between the laminated structure and the air on the output surface side. In FIG. 5, the refraction is determined by the traveling angle θb of light within the display device 1 due to the difference between the refractive index n ₂ of the laminated structure and the refractive index n ₁ of the air, and the difference between the light traveling angle θb outside the output surface of the display device 1. It is indicated by the difference between the light emission angle θa and the light emission angle θa.

More specifically, the following formula (1) holds true. Furthermore, if the interval in the Z direction between the pixel 48 and the dimming pixel 148 is G, the following equation (2) holds true. p in equation (2) is the width of the pixel 48 in the X direction. m is the positional shift in the X direction between the light emission point on the dimming pixel 148 side and the light incidence point on the pixel 48 side, which is caused by the light propagation angle θb in the display device 1, and is the number of pixels 48. This is a numerical value indicating the number of pixels 48 when converted by . Note that the refractive index (n ₁ ) of air is 1.0, and the refractive index (n ₂ ) of the laminated structure (second polarizing plate Po2, diffusion layer Po5, third polarizing plate Po3) is 1.0. They are different values. Based on equations (1) and (2), equation (3) is established. Therefore, based on equation (3), it is possible to calculate the blurring range mp corresponding to θa with the optical axis LL as the center from n ₁ , n ₂ , and θa. The dimming pixels 148 included in the blur range mp are controlled to transmit light. Note that G is, for example, the interval between the intermediate position of the pixel 48 in the Z direction and the intermediate position of the dimming pixel 148 in the Z direction. The intermediate position of the pixel 48 in the Z direction is the intermediate position of the display panel 30 in the Z direction. The intermediate position of the dimming pixel 148 in the Z direction is the intermediate position of the dimming panel 80 in the Z direction. Further, G can also be regarded as the distance of the liquid crystal layer LC1 between the display panel 30 and the light control panel 80. Hereinafter, when it is written as gap G, it refers to G explained in this paragraph.
n ₁ sin θa=n ₂ sin θb…(1)
Gtanθb=mp…(2)
mp=Gtan{sin ⁻¹ (n ₁ sinθa/n ₂ )}…(3)

As shown in the "panel schematic diagram" of "double image", assuming that the light is not blocked by the light blocking portion 48D due to the above-mentioned refraction, the light L1 that has passed through the dimming pixel 148 is emitted as light V1. It turns out. Actually, the light V1 is not emitted because the light is blocked by the light blocking portion 48D. Furthermore, the light L2 that has passed through the dimming pixel 148 is emitted as light V2. Furthermore, assuming that the light is not blocked by the light blocking portion 148D, the light that passes through the traveling axis of the light L3 indicated by the broken line is emitted as the light V3.

Here, if the output surface of the display device 1 in the state of the "panel schematic diagram" of the "double image" is viewed from the front, both sides in the X direction with the light shielding part 48D in between should be lit. That is, there is one non-light emitting (black) range when viewed from the front viewpoint. On the other hand, when the output surface of the display device 1 is viewed from a perspective angle that produces an output angle Θ ₁ with respect to the XY plane and the An axis exists. That is, two non-light emitting (black) ranges are generated that are lined up in the X direction with the light V2 in between. In this way, an image formed by one non-emissive (black) range when viewed from the front viewpoint is visually recognized as a double image formed by two non-emissive (black) ranges from a perspective angle. There is. In FIG. 5, an example of the occurrence of such a double image is illustrated as an "example of visual recognition from an oblique viewpoint" of a "double image".

Further, as shown in the "panel schematic diagram" in "Image Missing", assuming that the light is not blocked by the light blocking portion 148D, the light L4 will be emitted as the light V4. Actually, the light V4 is not emitted because the light is blocked by the light blocking portion 148D. Further, assuming that the light is not blocked by the light blocking portion 148D, the light L5 will be emitted as the light V5. Actually, the light V5 is not emitted because the light is blocked by the light blocking portion 148D. Even if the light is not blocked by the light blocking section 148D, the light V5 is not emitted because the light is blocked by the light blocking section 48D. Furthermore, assuming that the light is not blocked by the light blocking section 48D, the light L6 that has passed through the dimming pixel 148 will be emitted as light V6. Actually, the light V6 is not emitted because the light is blocked by the light blocking portion 48D.

Here, in the state of "panel schematic diagram" with "image chipping", the light-shielding part 48D is generated so as to sandwich the light-transmissible pixel 48 in the ) should be visible. On the other hand, when the emission surface of the display device 1 is viewed from a perspective angle that produces an emission angle Θ ₁ with respect to the XY plane and the X direction, the emission range is not visible. This is because, as described above, none of the lights V4, V5, and V6 are emitted. In this way, an image formed in one light emitting range when viewed from the front viewpoint may not be visible from a perspective angle. This mechanism causes image defects when viewing the display device 1 from a perspective angle. In FIG. 5, an example of occurrence of such image chipping is illustrated by "example of visual recognition from an oblique viewpoint" of "image chipping". Note that the dimming pixel 148 schematically shown in FIG. 5 has the same width in the X direction as the pixel 48 for the purpose of making it easier to understand the positional relationship with the pixel 48, but in reality it has the same width as the pixel 48 as described above. A plurality of pixels 48 are included within the range of one dimming pixel 148.

Therefore, in the embodiment, blurring processing is applied in controlling the range through which light is transmitted by the light control panel 80. Blur processing refers to processing that controls the dimming pixels 148 so that the dimming panel 80 transmits light in a wider range than the light transmitting range that would occur if the input signal IP was faithfully reflected. . Therefore, the range through which light can pass through the dimming panel 80 is wider than the range through which light can pass through the display panel 30. The blurring process will be described below with reference to FIG.

FIG. 6 shows the distance from the dimming pixel 148, which is treated as the center CL, determined based on the coordinates of the pixel 48, which is controlled to transmit light at the highest gradation, and the control to transmit light by blur processing. It is a graph which shows an example of the relationship between the degree of In the graph of FIG. 6, the horizontal axis indicates the distance, and the vertical axis indicates the degree of light transmission. Note that this distance is determined when the dimming pixel 148 located at the center CL is determined by the blur cancellation determination unit 13, which will be described later, based on the coordinates of the pixel 48 that is controlled to transmit light at the highest gradation. It shall be located at a distance of . Further, it is assumed that the dimming pixel 148 adjacent to the dimming pixel 148 having a distance of "0" is at a distance of "1" from the dimming pixel 148 having a distance of "0". In addition, other dimming pixels 148 are lined up in the X direction or Y direction at a distance equal to the number of intervening dimming pixels 148 + 1 with respect to the dimming pixel 148 at the distance of "0" as a reference. It is assumed that there is In addition, although FIG. 6 shows an example in which the gradation of the degree of light transmission is 8 bits (256 gradations), this is just an example and is not limited to this, and can be changed as appropriate. It is.

As illustrated in FIG. 6, in the embodiment, the blurring process causes not only the dimming pixels 148 at a distance of "0" but also the dimming pixels 148 whose distances are in the range of 1 to 6 to emit light. It is controlled to be transparent. Further, the dimming pixel 148 at a distance of "1" is controlled to transmit light to the same degree as the dimming pixel 148 at a distance of "0". Moreover, the dimming pixels 148 whose distance is "2" or more are controlled so that the degree of light transmission decreases as the distance increases. In this way, the blurring process is applied to the plurality of dimming pixels 148 included in the blurring range wid centered on the dimming pixel 148 at a distance of "0".

Note that the specific setting of how far away from the dimming pixel 148 at a distance of "0" should be included in the blurring range wid and allowing light to pass through the blurring process is arbitrary. More specifically, the blurring process is applied based on specifications such as the angle (θa) at which an oblique viewpoint with respect to the display device 1 is established and the size of the gap G. A range of distance from the dimming pixel 148 is set.

FIG. 7 is a diagram showing an example of display output contents based on the input signal IP to the display device 1. FIG. 8 is a diagram showing a light transmission range by the light control panel 80 to which blurring processing is applied based on the display output content shown in FIG. 7. In FIGS. 7 and 8, the range where light is controlled to pass through is shown in white, and the range where light is controlled to not pass through is shown in a dot pattern. As shown in the comparison between FIG. 7 and FIG. 8, in the dimming panel 80 to which the blurring process has been applied, the dimming pixels 148 are controlled so that light passes through a wider range than the display output content. . Specifically, in the display output content shown in FIG. 7, the dimming pixel 148 transmits light so that the border line of the range through which light is transmitted is made thicker and the range through which light transmits is further expanded to the outside. The extent to which this happens is controlled.

In the embodiment, there are conditions regarding the application of the blurring process to the edge of the screen, that is, the outer edge of the display area OA (for example, the outer edge Ed, which will be described later), and the vicinity thereof. Hereinafter, the conditions will be explained while comparing the comparative example and the embodiment. Note that the screen edges and their vicinity refer to both ends and their vicinity in the X direction and both ends and their vicinity in the Y direction of the display area OA shown in FIG. 3, for example.

FIG. 9 is a schematic diagram showing the operation of a display device in a comparative example in which blurring processing is applied unconditionally. As shown in FIG. 9, the light control panel 80 is interposed between the display panel 30 and the light source device 50, and controls the range in which light from the light source device 50 reaches the display panel 30, and controls the output of images by the display panel 30. Limit the light to the necessary area. In FIG. 9, a range where pixels 48 that require light for outputting an image by the display panel 30 are arranged is shown as a high brightness range WA. Further, a range where pixels 48 that do not require light for outputting an image by the display panel 30 are arranged is shown as a low brightness range BA. Note that "low brightness" in the low brightness range BA and "high brightness" in the high brightness range WA are expressions based on a relative comparison between the brightness in the low brightness range BA and the brightness in the high brightness range WA. The low-luminance range BA is visually recognized as a black range by the user viewing the display area OA. The high-luminance range WA is visually recognized by the user viewing the display area OA as a range of colors other than black (for example, white).

Among the dimming pixels 148 of the dimming panel 80, those included in the range located between the low luminance range BA and the light source device 50 and "located between the surroundings of the high luminance range WA and the light source device 50" The dimming pixels 148 included in the range other than "the range where the light is transmitted" are controlled so that the degree of light transmission is the lowest. Note that the "range located between the periphery of the high-luminance range WA and the light source device 50" herein refers to the range to which the blurring process is applied. Among the dimming pixels 148 of the dimming panel 80, the dimming pixels 148 included in the range located between the high brightness range WA and the light source device 50 are controlled so that the degree of light transmission exceeds the minimum level. be done. Furthermore, by applying the blurring process, the degree of light transmission of the dimming pixels 148 included in the "range located between the periphery of the high-luminance range WA and the light source device 50" also exceeds the minimum level. controlled by. Compared to the dimming pixels 148 included in "the range located between the surroundings of the high brightness range WA and the light source device 50", the pixels included in the range located between the high brightness range WA and the light source device 50 The dimming pixel 148 is controlled to increase the degree of light transmission. Also, among the dimming pixels 148 included in the "range located between the surroundings of the high-luminance range WA and the light source device 50", the dimming pixels 148 located closer to the high-luminance range WA from the front viewpoint , the degree of light transmission is controlled to be higher.

FIG. 9 shows a high brightness range WA located at the outer edge Ed and a high brightness range WA located away from the outer edge Ed and its vicinity. Further, the range including the dimming pixels 148 that are controlled so that the degree of light transmission in the dimming panel 80 is the lowest is shown as a dark range BBA. Moreover, the range including the dimming pixel 148 that is controlled so that the degree of light transmission exceeds the minimum level in the dimming panel 80 is shown as blurred ranges BWA1 and BWA2. The blurred range BWA1 is located between the light source device 50 and the high-intensity range WA located away from the outer edge Ed and its vicinity. The blur range BWA2 is located between the light source device 50 and the high brightness range WA located at the outer edge Ed. The blurring range BWA1 and the blurring range BWA2 include dimming pixels 148 that are controlled so that the degree of light transmission exceeds the minimum level by applying the blurring process.

FIG. 10 is a schematic diagram showing an example of the operation of the display device 1 in the embodiment. In the embodiment, the blurred range BWA2 in the comparative example described with reference to FIG. 9 is replaced with a non-blurred range BWA3. The blur range BWA2 is an adjustment area included in the "range located between the periphery of the high brightness range WA and the light source device 50" where the degree of light transmission is controlled to exceed the minimum by applying the blur process. A pixel 148 for light is included. On the other hand, the non-blurring range BWA3 is a "range located between the periphery of the high-brightness range WA and the light source device 50" where the degree of light transmission is controlled to exceed the minimum by applying the blurring process. It does not include the included dimming pixel 148. As described above, in the embodiment, the blurring process may not be applied in controlling the dimming pixels 148 that are controlled to transmit light corresponding to the outer edge Ed and the high brightness range WA located in the vicinity thereof. . Hereinafter, not applying the blurring process to the outer edge Ed and its vicinity will be described with reference to FIG. 11.

FIG. 11 is a schematic diagram showing an image visually recognized when the high-luminance range WA and its vicinity are viewed from each of the viewpoints P1, P3, and P4 shown in FIGS. 9 and 10. Note that FIG. 11 is a schematic diagram assuming that the high brightness range WA shown in FIGS. 9 and 10 is a linear high brightness range along the Y direction.

As shown in the "P1" column in FIG. 11, when viewing the high brightness range WA at a position away from the outer edge Ed and its vicinity from the viewpoint P1 shown in FIGS. 9 and 10, the user A linear high-luminance range WA along the line and a low-luminance range BA surrounding it are visually recognized. The viewpoint P1 is a viewpoint that views the high brightness range WA from the front.

Furthermore, as shown in the "P3" column in the "Comparative Example" of FIG. A linear high brightness range WA, a low brightness range BA surrounding it, and a display area OA located on the opposite side of the low brightness range BA across the high brightness range WA and outside the outer edge Ed of the display device. , will be visually recognized. The viewpoint P3 is a viewpoint that views the high brightness range WA from the front.

FIG. 12 is a schematic diagram showing an enlarged partial range U1 shown in the "P1" column in FIG. 11 and the "P3" column in the "Comparative Example". Partial range U1 and partial ranges U2, U3, and U4, which will be described later, are conveniently set at and near the boundary between high-luminance range WA and low-luminance range BA for the purpose of showing the boundary and its vicinity in more detail. This is the range. By applying the blurring process, a range where the brightness gradually decreases from the high brightness range WA side to the low brightness range BA side is created between the high brightness range WA and the low brightness range BA. In FIG. 12, the range between the high brightness range WA and the low brightness range BA is shown as a blurred range GA1.

However, the user viewing the high brightness range WA and its vicinity from the viewpoint P1 and the user viewing the high brightness range WA and its vicinity from the viewpoint P3 in the comparative example rarely recognize the blurred range GA1. This is because the contrast difference between the high-luminance range WA and the low-luminance range BA is significantly significant, so the degree of change in contrast between the high-luminance range WA and the low-luminance range BA is relatively gradual. This is because GA1 becomes less noticeable. Therefore, the occurrence of the blurred range GA1 between the high-luminance range WA and the low-luminance range BA does not substantially pose a problem in terms of the image quality of the image including the high-luminance range WA and the low-luminance range BA.

Although not illustrated in FIG. 11, when viewing the high brightness range WA at a position away from the outer edge Ed and its vicinity from the viewpoint P2 in FIGS. 9 and 10 from the viewpoint P1, it is almost the same as the viewpoint P1. Images can be viewed.

As shown in the "P4" column in the "Comparative Example" of FIG. A high brightness range WA, a surrounding low brightness range BA, and a frame area PA located on the opposite side of the low brightness range BA across the high brightness range WA and located outside the outer edge Ed of the display device. It will be visible. Viewpoint P4 is a viewpoint that obliquely views the high brightness range WA from the low brightness range BA side toward the frame area PA side.

FIG. 13 is a schematic diagram showing an enlarged partial range U2 shown in the column "P4" in the "comparative example" of FIG. In the comparative example, by applying the blurring process to the control of the dimming panel 80 corresponding to the high brightness range WA located at the outer edge Ed, there is no difference between the high brightness range WA and the low brightness range BA. There is a range where the brightness gradually decreases from the high brightness range WA side to the low brightness range BA side. In FIG. 13, the range between the high brightness range WA and the low brightness range BA is shown as a blurred range GA2. Here, the viewpoint P4 is a viewpoint that obliquely views the high brightness range WA from the low brightness range BA side toward the frame area PA side. The light source device 50 does not extend to the back side of the high brightness range WA at this viewpoint. Therefore, a diagonal line of light from the light source device 50 passing through the light control panel 80 and the display panel 30 and reaching the viewpoint P4 is not formed. Therefore, as shown in FIG. 13, the high brightness range WA seen from the viewpoint P4 appears to be a low brightness range compared to when the high brightness range WA is seen from the viewpoints P1, P2, and P3. It turns out. This means that the contrast difference between the high brightness range WA and the low brightness range BA in the partial range U2 is greater than the contrast difference between the high brightness range WA and the low brightness range BA in the partial range U1 described with reference to FIG. is also small. Therefore, when looking at the high brightness range WA located at the outer edge Ed from the viewpoint P4 in the comparative example, the low brightness range BA occurs from the high brightness range WA side to the low brightness range BA that occurs between the high brightness range WA and the low brightness range BA. A blurred range GA2, which is a range whose brightness gradually decreases toward the sides, can be recognized. As a result, in the comparative example, when an image with a high brightness range WA located at or near the outer edge Ed is output, a user who views the image from a viewpoint that obliquely views the display device, such as viewpoint P4, may see the blurred range GA2. can be visually recognized. The blur range GA2 is caused by applying the blur process and does not correspond to the display output content included in the input signal IP input from the control device 2, and light leakage occurs near the outer edge of the frame area PA. It may be perceived as if it were. The fact that an image in which such a blurred range GA2 can be recognized is output is difficult to overlook as a result of the image quality of an image including the high-luminance range WA and the low-luminance range BA.

Therefore, in the embodiment, conditions are set for applying the blurring process to the outer edge Ed and its vicinity, and the blurring process is not applied when the conditions are not met. This suppresses the output of an image in which the user can recognize the blurred range GA2, as described with reference to FIG. 13. The "Embodiment" column in FIGS. 10 and 11 schematically shows a case where the conditions for applying the blurring process are not satisfied for the high brightness range WA located at the outer edge Ed.

As shown in the "P3" column in "Embodiment" in FIG. 11, when viewing the high brightness range WA located at the outer edge Ed and its vicinity from the viewpoint P3 shown in FIG. A high brightness range WA, a surrounding low brightness range BA, and a frame area PA located on the opposite side of the low brightness range BA across the high brightness range WA and located outside the outer edge Ed of the display device. It will be visible.

FIG. 14 is a schematic diagram showing an enlarged partial range U3 shown in the column "P3" in "Embodiment" of FIG. Since the blurring process is not applied, instead of the blurring range GA1 that occurred due to the blurring process being applied in the comparative example, a boundary range GA3 shown in FIG. 14, which is substantially the same as the low brightness range BA, is created. This results in a range of The output of such an image is suitable as an image that can be visually recognized from a viewpoint viewing the display device 1 from the front, such as the viewpoint P3.

Furthermore, when viewing the high brightness range WA located at the outer edge Ed and its vicinity from the viewpoint P4 shown in FIG. 10, the user can A linear high-luminance range WA, a surrounding low-luminance range BA, and a frame area PA located on the opposite side of the low-luminance range BA across the high-luminance range WA and outside the display device from the outer edge Ed. , will be visually recognized.

FIG. 15 is a schematic diagram showing an enlarged partial range U4 shown in the column "P4" in "Embodiment" in FIG. Even if the blurring process is not applied in the embodiment, when the high-luminance range WA located at the outer edge Ed seen from the viewpoint P4 is viewed from the viewpoint P4, the high-luminance range WA is viewed from the viewpoints P1, P2, and P3. This is similar to the comparative example in that the brightness appears to be in a lower range than in the case where the brightness is lower. On the other hand, since the blurring process is not applied, instead of the blurring range GA2 that occurred when the blurring process was applied in the comparative example, the boundary range GA4 shown in FIG. A similar range occurs in . In this manner, in the embodiment, it is possible to prevent a range such as the blurred range GA2 that does not correspond to the display output content included in the input signal IP input from the control device 2 from being visually recognized by the user.

Next, conditions for applying the blurring process to the screen edge (for example, the outer edge Ed described with reference to FIGS. 10 and 11) and its vicinity in the embodiment will be described with reference to FIGS. 16 and 17.

FIG. 16 is a schematic diagram showing an example of the relationship between the position of the user's viewpoint E and the imaging range AoV of the imaging device 90 when blurring processing is applied to the screen edge and its vicinity in the embodiment. FIG. 17 is a schematic diagram showing an example of the relationship between the position of the user's viewpoint E and the imaging range AoV of the imaging device 90 when the blurring process is not applied to the screen edge and its vicinity in the embodiment.

The imaging device 90 includes an imaging device such as a CMOS (Complementary Metal Oxide Semiconductor) sensor, and an image generation device that generates an image according to an electric signal output from the imaging device in response to light detected by the imaging device. including.

In the examples shown in FIGS. 16 and 17, of the range in which light is detected by the image sensor of the imaging device 90, that is, the range in which images are captured by the imaging device 90, the range on the display device 1 side is defined as the imaging range AoV. is indicated by a broken line. The range closer to the imaging device 90 than the imaging range AoV is imaged by the imaging device 90. The range closer to the display device 1 than the imaging range AoV is not imaged by the imaging device 90.

The imaging device 90 shown in FIGS. 16 and 17 is provided so that the viewpoint E is imaged by the imaging device 90 when the viewpoint E is located in a range where the outer edge Ed can be seen almost straight on. Therefore, when the viewpoint E is within the imaging range AoV as shown in FIG. 16, strabismus like the viewpoint P4 described with reference to FIG. 10 does not occur, and the outer edge Ed and A pixel 48 located in the vicinity thereof will be visually recognized. In this case, the conditions for applying the blurring process also hold true in the embodiment. That is, in this case, it is included in the range located between the low brightness range BA and the light source device 50, and is located between the light source device 50 and the periphery of the high brightness range WA located at and near the outer edge Ed. The dimming pixels 148 included in the range are controlled so that the degree of light transmission exceeds the minimum. Therefore, in the example shown in FIG. 16, a blurred range BWA2 occurs between the high brightness range WA located at the outer edge Ed and the light source device 50.

On the other hand, if the viewpoint E is not within the imaging range AoV as shown in FIG. 17, strabismus like the viewpoint P4 described with reference to FIG. 10 may occur. In this case, the conditions for applying the blurring process are not met. Therefore, in the example shown in FIG. 17, a non-blurred range BWA3 occurs between the high brightness range WA located at the outer edge Ed and the light source device 50.

Note that the imaging range AoV of the imaging device 90 and the arrangement of the imaging device 90 are not limited to the examples shown in FIGS. 16 and 17. Depending on the correspondence between the position where the imaging device 90 is provided and the imaging range AoV, whether or not the viewpoint E is imaged, and the position of the viewpoint E in the imaging range AoV when the viewpoint E is imaged, the user can It is sufficient that the position of the imaging device 90 and the imaging range AoV are set in advance so that it can be determined whether to obliquely view Ed and the high brightness range WA located near it.

FIG. 18 is a block diagram showing an example of the functional configuration of the signal processing section 10. As shown in FIG. The signal processing section 10 includes a first gamma conversion section 11 , a resolution conversion section 12 , a blur cancellation determination section 13 , a blur processing section 14 , a second gamma conversion section 15 , and a register 16 . The first gamma conversion unit 11, resolution conversion unit 12, blur cancellation determination unit 13, blur processing unit 14, and second gamma conversion unit 15 shown in FIG. 18 may each be one circuit. Alternatively, it may be a part of the function performed by the configuration provided as the signal processing section 10.

The first gamma conversion unit 11 performs gamma correction processing when gamma correction is required between the input value and the output value. The input value here is the RGB gradation value of each pixel included in the frame image indicated by the input signal IP. Further, the output value is the brightness of the pixel 48 that is perceived by a user viewing the display area OA when the pixel 48 included in the display panel 30 is controlled with a voltage according to the input value. In the embodiment, when looking at the one-to-one relationship between each RGB gradation value and each pixel 48, it is assumed that an appropriate output value can be obtained by controlling the pixel 48 according to the input value, and no special correction is performed. It won't happen. However, depending on the gamma characteristics of the display panel 30, the first gamma conversion unit 11 performs gamma correction processing.

In the embodiment, as described above regarding the first gamma conversion unit 11, the RGB gradation value (input value) indicated by the pixel data given to the pixel 48 at a certain position of the input signal IP corresponding to one frame image is and the RGB gradation value (output value) indicated by the pixel data provided to the pixel 48 by the output image signal OP based on the input signal IP are the same. Therefore, when the input value is Ic and the output value is g0(Ic), Ic=g0(Ic) holds true. Furthermore, g0(Ic) can be expressed in the form of an RGB gradation value, that is, (R, G, B)=(α, β, γ). Here, α, β, and γ are numerical values corresponding to the number of bits of information indicating the gradation value, respectively. For example, in the case of 8 bits, α, β, and γ each take a value within the range of 0 to 255.

The resolution conversion unit 12 converts the resolution of the image data input as the input signal IP, that is, the number of pixels arranged in the X direction and the number of pixels arranged in the Y direction, and the If the number of rows in the direction and the number of rows of dimming pixels 148 in the Y direction do not correspond, the resolution of the image data is determined by the number of rows of dimming pixels 148 provided in the dimming panel 80 in the X direction and the number of rows of dimming pixels 148 in the Y direction. The resolution of the image data is converted to correspond to the number of pixels 48 arranged in the Y direction. As a specific algorithm for the resolution conversion, a well-known algorithm such as the nearest neighbor method can be used, so a detailed explanation will be omitted. Note that the first data Sig1 outputted from the resolution converter 12 to the blurring processor 14 is data based on the input signal IP, and is data that has undergone resolution conversion when resolution conversion by the resolution converter 12 is required. It is. When the number of pixels arranged in the X direction and the number of pixels arranged in the Y direction correspond to the number of arranged pixels 148 in the X direction and the number of pixels 48 arranged in the Y direction provided in the dimming panel 80, The resolution of the image data based on the first data Sig1 is the same as the resolution of the image data input as the input signal IP, and is not subjected to resolution conversion by the resolution conversion unit 12.

The blurring cancellation determining unit 13 determines whether a condition for applying the blurring range is met. Specifically, based on the information indicated by the captured image of the imaging device 90 and the information stored in the register 16, the blur cancellation determination unit 13 determines that the information indicated by the captured image of the imaging device 90 is, for example, As described above, whether or not the viewpoint E is included in the captured image of the imaging device 90, and if the viewpoint E is included in the captured image of the imaging device 90, the position of the viewpoint E in the imaging range AoV of the imaging device 90 is determined. Point to where it is. The information stored in the register 16 will be described later.

The blur processing unit 14 performs various processes related to application of blur processing. In the embodiment, the blurring range derived by the blurring processing unit 14 is, for example, the blurring range wid centered on the center CL, which was described with reference to FIG. In the following specific example, priority is given to ease of understanding, and a case where resolution conversion by the resolution conversion unit 12 is not performed will be described as an example. In addition, a case is taken as an example in which the gradation values of the input value Ic and the output value g0 (Ic) are 8 bits.

To give a specific example, among the pixels included in the image data input to the signal processing unit 10 as the input signal IP, the RGB gradation value indicated by the input value Ic of one pixel is (R, G, B) = (255, 255, 255). In this case, the first sub-pixel 49R, second sub-pixel 49G, and third sub-pixel 49B of the pixel 48 to which the output value g0 (Ic) corresponding to the input value Ic is given have a predetermined degree of light transmission. The degree of light transmission is controlled to be the highest (100%) within the control range (0% to 100%). The dimming pixel 148 located in the Z direction with respect to the pixel 48 is treated as being located at the center CL, and is the highest within a predetermined control range (0% to 100%) of the degree of light transmission. The degree of light transmission is controlled to be (100%). Here, the RGB gradation value indicated by the input value Ic of another pixel, which is the source of the output value g0(Ic) given to the other pixel 48 included in the blur range wid centered on the pixel 48, is (R , G, B) = (0, 0, 0). In this case, when the blurring process is applied to the dimming pixel 148 located in the Z direction with respect to other pixels 48 included in the blurring range wid, for example, the light level indicated by "Level" in the graph shown in FIG. The degree of transparency is controlled. To give a specific example with reference to FIG. 6, the light transmission of the dimming pixel 148 located in the Z direction with respect to the pixel 48 located five pixels apart in the X direction from the pixel 48 concerned. The degree is controlled to correspond to the dimming gradation value LV5. The degree of light transmission of the dimming pixels 148 located at other positions is also controlled in a similar way.

Note that the setting of the degree of light transmission of the light control pixel 148 within the blur range wid, which is illustrated in FIG. This is a case where the degree of light transmission of the pixel 48 located at CL is 100%. The degree of light transmission of the pixel 48 located at the center CL is Q%, and when Q is a value of 0 or more and less than 100, the degree of light transmission of the dimming pixel 148 located at the center CL is Q%. The degree of light transmission set for each of the plurality of dimming pixels 148 within the blur range wid is set according to the degree of separation from the center CL (Distance [px]) illustrated in FIG. The degree of transmission of light is multiplied by (Q/100). Furthermore, the output value g0( If the degree of transmission of light set in the corresponding dimming pixel 148 corresponding to Ic) is higher, the degree of light transmission set in the corresponding dimming pixel 148 corresponding to the output value g0(Ic) is higher. Priority is given to the degree of transparency. Furthermore, when one dimming pixel 148 is located within a range where a plurality of blurring ranges wid set with each of the plurality of pixels 48 as the center CL overlap, each of the plurality of blurring ranges wid is The highest degree of light transmission among the correspondingly set degrees of light transmission is reflected in the dimming pixel 148.

To summarize the above specific example, when one dimming pixel 148 is set as a pixel of interest, the pixel of interest is a pixel of interest, and each of the plurality of pixels 48 included in the blur range wid from the front viewpoint centering on the pixel of interest, Multiple reference pixels. That is, the pixel of interest refers to one dimming pixel 148, and the reference pixel refers to the pixel 48. The reference pixel is set for the purpose of referring to the input value Ic in order to determine the dimming gradation value of the pixel of interest based on the input value Ic given to the pixel 48. Here, the pixels 48 to which the blurring process is not applied are not used as reference pixels, except for the pixel 48 located in the Z direction with respect to the pixel of interest (the pixel 48 whose positional relationship with the pixel of interest corresponds to the center CL). The blur processing unit 14 sets each reference pixel based on the output value g0 (Ic) given to each of the plurality of reference pixels and the degree of separation (Distance [px]) between each of the plurality of reference pixels and the pixel of interest. The degree of light transmission (candidate value for addition) to be set for the pixel of interest is individually determined in accordance with the degree of light transmission of the pixel. The blur processing unit 14 selects the addition candidate value with the highest degree of light transmission among the plurality of addition candidate values obtained for one pixel of interest as the light transmission value to be applied to the one pixel of interest. Determined as an additional value indicating the degree. The one pixel of interest is controlled by the dimming panel drive unit 140 so that the degree of light transmission corresponds to the added value. The blur processing unit 14 individually determines an addition value for each of the plurality of dimming pixels 148. The dimming signal DI includes information corresponding to the added value of each dimming pixel 148 determined in this manner. Strictly speaking, the information included in the dimming signal DI of the embodiment is the information determined by reflecting the gamma correction processing by the second gamma converter 15 on the added value of each dimming pixel 148. This is information indicating the degree of light transmission of the dimming pixel 148.

The second gamma conversion unit 15 performs gamma correction processing when gamma correction is necessary for the dimming gradation value. In the embodiment, the second gamma conversion unit 15 converts the dimmer panel 80 and the display panel 30 into the lowest gradation (0) and the dimmer panel 80 and the display panel 30 both into the highest gradation (8 bits). Then, gamma correction processing is performed so that the gamma curve between the case of 255) becomes a desired gamma curve (for example, a gamma curve corresponding to a gamma value of 2.2). If the coefficient used in the gamma correction process is g1, the dimming gradation value after the gamma correction process by the second gamma conversion unit 15 can be expressed as g1 (Ic _max +A).

The first gamma conversion section 11 outputs the output image signal OP to the display panel 30. Here, the output image signal OP is a set of the above-mentioned g0(Ic) for each of the plurality of pixels 48. Each pixel 48 is driven according to g0 (Ic) by the operation of the display panel driving section 40. The second gamma conversion unit 15 outputs the dimming signal DI to the dimming panel 80. Here, the dimming signal DI is a set of the above g1(Ic _max +A) for each of the plurality of dimming pixels 148. By the operation of the dimming panel driving section 140, each dimming pixel 148 is driven according to g1 (Ic _max +A). That is, the light control panel 80 operates so that the degree of light transmission by each of the plurality of light control pixels 148 corresponds to each light control gradation value. Note that in the embodiment, all of the plurality of sub-pixels 49 included in one dimming pixel 148 are driven to have a degree of light transmission corresponding to the dimming gradation value of the one dimming pixel 148. .

The register 16 has a storage circuit (for example, a flash memory) that stores information for determining "the range treated as the screen edge and its vicinity." Specifically, the register 16 stores a value (D) for treating the D-th pixel 48 from the edge as a pixel 48 included in "a range treated as the screen edge and its vicinity." In the embodiment, D is a natural number, but D may be set to 0.

More specifically, the pixel 48 located at at least one of both ends in the X direction and both ends in the Y direction of the display area OA is treated as "the first pixel 48 from the end". Therefore, for example, when D=1, pixels 48 located at at least one of both ends in the X direction and both ends in the Y direction of the display area OA are treated as pixels 48 included in "a range treated as the screen edge and its vicinity". Other pixels 48 located inside the display area OA are treated as pixels 48 that are not included in the "range treated as the screen edge and its vicinity". Further, when D=2, the pixel 48 located at at least one of both ends in the X direction and both ends in the Y direction of the display area OA, and at least in the X direction and Y direction within the display area OA for the pixel 48 On the other hand, the adjacent pixels 48 are treated as pixels 48 included in the "range treated as the screen edge and its vicinity". When D is a value of 3 or more, the pixels 48 included in the "range treated as the screen edge and its vicinity" are determined using the same concept.

The blurring process is not applied to the pixels 48 included in the "range treated as the screen edge and its vicinity" unless the user's viewpoint E is in a position that directly views "the range treated as the screen edge and its vicinity". That is, the pixel 48 included in the "range treated as the screen edge and its vicinity" is subject to blurring unless the user's viewpoint E is in a position that directly views "the range treated as the screen edge and its vicinity". For the dimming pixel 148 that is treated as a pixel 48 for which the condition does not hold and is included in the blur range wid centered on the pixel 48, the degree of light transmission is controlled at the center CL as shown in FIG. 6, for example. It is not applied except for the corresponding dimming pixel 148. Note that the display device 1 does not need to include the imaging device 90. If the imaging device 90 is not provided, determination as to whether the user is viewing the outer edge Ed and its vicinity from the front or obliquely is omitted. Furthermore, in this case, the blurring process at and around the outer edge Ed is automatically canceled.

On the other hand, the blurring process is applied to pixels 48 that are not included in the "range treated as the screen edge and its vicinity" regardless of the position of the user's viewpoint E. That is, for example, control of the degree of light transmission as shown in FIG. 6 is applied to the dimming pixel 148 included in the blur range wid centered on the pixel 48. In addition, in the embodiment, when the user's viewpoint E is in a position where the user's viewpoint E is in a position that looks straight at "the range treated as the screen edge and its vicinity", the pixel 48 included in "the range treated as the screen edge and its vicinity" is Although the blurring process is also applied, the relationship between the user's viewpoint E and the application of the blurring process may be omitted. That is, the process related to acquiring the user's viewpoint E and the imaging device 90 may be omitted, and the blurring process may not be automatically applied to the pixels 48 included in "the range treated as the screen edge and its vicinity".

Identifying the position of the user's viewpoint E based on the captured image of the imaging device 90 and deciding whether to apply blurring processing to each pixel 48 according to the position of the viewpoint E and the value (D) set in the register 16. The determination is performed, for example, by the blurring cancellation determination unit 13. The blurring cancellation determination unit 13 uses second mapping data of the pixels 48 indicating which pixels 48 to which the blurring process is applied and which pixels 48 to which the blurring process is not applied, among the plurality of pixels 48 included in the display area OA. The data is output to the blur processing unit 14 as data Sig2. The blur processing unit 14 determines the added value of each dimming pixel 148 according to the first data Sig1 and the second data Sig2. Note that the blur cancellation determination section 13 may be integrated into the blur processing section 14 as part of the functions of the blur processing section 14, for example.

The blurring processing unit 14 that performs processing related to application of the blurring processing described above will be described in more detail with reference to FIG. 19.

FIG. 19 is a block diagram showing an example of the functional configuration of the blurring processing section 14. As shown in FIG. The blur processing section 14 includes an RGB maximum gradation extraction section 1411, a line memory selector 1412, a line memory section 1413, a 2d-LUT 1414, a blur cancellation width holding section 1415, and a 2d filter 1416.

The RGB maximum gradation extraction unit 1411 extracts and outputs the highest gradation value among the RGB gradation values indicated by the input value (Ic). For example, the highest gradation value in (R, G, B)=(255, 128, 100) is the R gradation value (255). Furthermore, the highest gradation value at (R, G, B)=(0,128,100) is the G gradation value (128). Further, the highest gradation value at (R, G, B)=(0, 0, 100) is the gradation value of B (100). The degree of light transmission of the pixel 48 to which the output value (g0 (Ic)) corresponding to the input value (Ic) is given is determined by the highest gradation value among the RGB gradation values indicated by the input value (Ic). It will be reflected.

The line memory selector 1412 stores the output of the RGB maximum gradation extraction section 1411 in one of the plurality of line memories included in the line memory section 1413. Line memory section 1413 includes line memories corresponding to the number of scanning lines SCL. Each line memory is a storage circuit having gradation value storage units corresponding to the number of pixels 48 that share one scanning line SCL. The highest gradation value extracted from which input value (Ic) is stored in which gradation value storage section of which line memory is determined based on the input signal IP (image data) of the pixel indicating the input value (Ic). The correspondence relationship between the position and the position in the display area OA of the pixel 48 to which the output value (g0(Ic)) corresponding to the input value (Ic) is given is followed. Therefore, if the line memory unit 1413 has completely stored the highest gradation value extracted from the input values (Ic) of all pixels included in the input signal IP of one image data, the line memory unit 1413 The highest gradation value map (information indicating the highest gradation value of the subpixel 49 included in each pixel 48) of the display area OA corresponding to the data is stored. The degree of light transmission through the dimming pixel 148 is controlled according to the highest gradation value map of the display area OA.

The 2d-LUT 1414 shows the width of the blurring range when blurring processing is applied (for example, the blurring range wid) and the distribution of the degree of light transmission within the blurring range (for example, the center The information indicating the distribution of the degree of light transmission according to the distance from the CL is held. In the embodiment, the 2d-LUT 1414 holds data corresponding to the graph shown in FIG. 6, for example, in a look-up table (LUT) format, but the specific blur range and light The degree of transparency and data format are not limited to these, and can be changed as appropriate. The blur cancellation width holding unit 1415 is a register that holds second data Sig2.

The 2d filter 1416 uses the highest gradation value map of the display area OA stored in the line memory unit 1413, the information stored in the 2d-LUT 1414, and the second data Sig2 held in the blur cancellation width storage unit 1415. Accordingly, the degree of light transmission (light control gradation value) of each light control pixel 148 is determined. Regarding the determination of the dimming gradation value of each dimming pixel 148, for example, the explanation regarding the determination of the degree of light transmission of the dimming pixel 148 described in the explanation regarding the application of the blurring process mentioned above is the same. Hereinafter, the flow of processing by the 2d filter 1416 will be explained with reference to the flowchart of FIG. 20.

FIG. 20 is a flowchart showing the flow of processing by the 2d filter 1416. First, the dimming gradation values of all the dimming pixels 148 included in the dimming panel 80 are set in accordance with the input value Ic indicated by the pixel signal included in the input signal IP (step S0). That is, first, as a basic premise, the degree of light transmission corresponding to the pixel signal given to each pixel 48 that overlaps each dimming pixel 148 from the front viewpoint is set for each dimming pixel 148. The degree of light transmission set in each dimming pixel 148 in the process of step S0 does not become lower in the processes after step S1. After the processing in step S0, the 2d filter 1416 selects one unprocessed pixel of interest (step S1). In step S1, the 2d filter 1416 treats the dimming pixels 148 for which dimming gradation values have not yet been determined among the dimming pixels 148 provided in the dimming panel 80 as unprocessed pixels of interest, One of the unprocessed pixels of interest is targeted for processing.

After the processing in step S1, the 2d filter 1416 initializes the processing state of the reference pixel (step S2). A plurality of pixels 48 whose information (degree of light transmission) is to be referred to when determining the dimming gradation value of the reference pixel, that is, the dimming pixel 148 treated as one pixel of interest, are set for each pixel of interest. different. Therefore, every time the pixel of interest is updated in the process of step S1, the processing state regarding the reference pixel is also initialized in the process of step S2. After the processing in step S2, the 2d filter 1416 initializes the addition value for the pixel of interest selected in step S1 to 0 (step S3).

The 2d filter 1416 selects, as an unprocessed reference pixel, one reference pixel that has not yet undergone the processing from step S5 onwards from among the plurality of reference pixels corresponding to the latest pixel of interest selected in the process of step S1 ( Step S4). Here, the plurality of reference pixels corresponding to the latest pixel of interest refer to, for example, as described above, the plurality of pixels 48 included in the blur range wid from the front viewpoint centering on the pixel of interest. This is an example where the information held by the 2d-LUT 1414 corresponds to the graph shown in FIG. Therefore, if the specific information held by the 2d-LUT 1414 is different from the graph shown in FIG. 6, the pixel 48 selected as the reference pixel may also be different.

The 2d filter 1416 determines whether the reference pixel selected in step S4 is to be subjected to blurring processing (step S5). Specifically, the 2d filter 1416 refers to the second data Sig2 held in the blurring cancellation width holding unit 1415, and determines whether the pixel 48, which is the reference pixel selected in step S4, satisfies the conditions for applying the blurring process. It is determined whether the pixel 48 is

If the reference pixel selected in step S4 is to be applied to the blurring process (step S5; Yes), the 2d filter 1416 selects addition candidates based on the positional relationship between the reference pixel and the pixel of interest and the gradation value of the reference pixel. A value is calculated (step S6). The positional relationship between the reference pixel and the pixel of interest refers to, for example, the degree of separation from the center CL (Distance [px]) shown in FIG. 6. That is, the 2d filter 1416 calculates the distance shown in FIG. 6 to determine how far the pixel of interest selected in step S1 is from the center CL when the position of the reference pixel selected in step S4 is the center CL. It is specified by applying the distance (Distance [px]). Further, the 2d filter 1416 refers to the line memory unit 1413 and specifies the degree of light transmission of the reference pixel selected in step S4 as the gradation value of the reference pixel. The degree of light transmission of the reference pixel is determined by RGB, which is extracted from the input value (Ic) that is the basis of the output value (g0 (Ic)) given to the pixel 48, which is the reference pixel, and stored in the line memory. This is the highest gradation value of the gradation values. For example, by setting the tone value of the reference pixel as Q% (or 100%) and correcting LevelL (see FIG. 6) specified by the positional relationship between the reference pixel and the pixel of interest, the addition candidate value is calculated. Ru.

The 2d filter 1416 determines whether an addition candidate value larger than the addition value held at the time of completion of the process of the last process S6 has been calculated in the last process S6 (step S7). If an addition candidate value larger than the addition value is calculated (Step S7; Yes), the 2d filter 1416 updates the addition value with the addition candidate value (Step S8).

After the processing in step S8 or when an addition candidate value less than or equal to the addition value is calculated (step S7; No), the 2d filter 1416 checks whether there are any unprocessed reference pixels (step S9). If there are unprocessed reference pixels (step S9; Yes), the process moves to step S4.

On the other hand, if there is no unprocessed reference pixel (step S9; No), the 2d filter 1416 adds the added value to the gradation value of the pixel of interest (step S10). Note that since the gradation value of the pixel of interest before the addition value is added is 0, the addition value is reflected in the gradation value of the pixel of interest, that is, the dimming gradation value. Through the process in step S10, the dimming gradation value of the pixel of interest selected in the last processed step S1 is determined.

After the processing in step S10, the 2d filter 1416 checks whether there is an unprocessed pixel of interest, that is, a pixel of interest whose dimming gradation value has not been determined (step S11). If there is an unprocessed pixel of interest (step S11; Yes), the process moves to step S1. On the other hand, if there is no unprocessed pixel of interest (step S11; No), the processing of the 2d filter 1416 corresponding to one image data (one frame of display output content from the display area OA) ends.

Note that the process of determining the dimming gradation value by the 2d filter 1416 is based on the following formulas (4), (5), (6), (7), (8), and (9). It can also be expressed. Note that formula (7) represents f _{x, y} when formula (4), formula (5), and formula (6) all hold, and formula (8) represents formula (4), formula (5). and f _x,y when one or more of equations (6) does not hold.
Is _{x, y} > Ic…(4)
D<Xs<Xmax−D…(5)
D<Ys<Ymax−D…(6)
f _{x, y} = e[Ps _{x, y} - P3] x | Is _{x, y} - Ic |... (7)
f _x,y =0...(8)
A=max(fx _,y )...(9)

Is _{x, y} in equations (4) and (7) is a certain pixel 48 located within a blur range (for example, blur range wid) centered on the dimming pixel 148 that is the pixel of interest, that is, This is the dimming gradation value of the dimming pixel 148 determined by applying blurring processing to the gradation value of one reference pixel.

Ic in equations (4) and (7) is the pixel 48 that overlaps the dimming pixel 148, which is the pixel of interest, from the front viewpoint, that is, the dimming pixel 148 is located on the center CL of the pixel 48. This is the dimming gradation value of the light pixel 148.

D in equations (5) and (6) is a value indicating the distance from the end set in the register 16. That is, Equation (5) represents the coordinate in the X direction of the pixel 48 that satisfies the conditions for applying the blurring process. Further, equation (6) represents the coordinate in the Y direction of the pixel 48 where the conditions for applying the blurring process are satisfied.

Equation (7) f _{x, y} represents the correction candidate value (object of calculation according to Equation (7)) calculated corresponding to Is _{x, y} in Equation (4).

e in equation (7) is a value that is preset according to the positional relationship between the pixel of interest and the reference pixel of the pixel of interest, and is held as information included in the LUT. The LUT is held by, for example, a 2d-LUT 1414.

Ps _{x, y} in equation (7) are the coordinates of the pixel 48 that is used as one reference pixel when calculating Is _{x, y} in equation (4).

P3 in equation (7) is the coordinate of the dimming pixel 148, which is the pixel of interest.

Equation (9) calculates the maximum value of _f A indicates that the above-mentioned g1 (Ic _max +A) is adopted as A.

As explained above, according to , the display device 1 includes a display panel (display panel 30) including a plurality of pixels (pixels 48), and a display panel arranged to face the display panel on one side of the display panel. A light control panel (light control panel 80) including a plurality of light control pixels (light control pixels 148), a light source (light source device 50) that irradiates light directed from the light control panel side to the display panel side, Equipped with

When a pixel (pixel 48) is controlled to transmit light according to an input image signal (for example, an input signal IP) and a predetermined condition is satisfied, the display device 1 performs a plurality of dimming operations. A blurring process is applied in which the pixels for dimming (dimmer pixels 148) transmit light, and a blurring range (for example, blurring range BWA1) is a range including the plurality of pixels for dimming to which the blurring process is applied. etc.) is formed, and light from the light source (light source device 50) is transmitted through the blurred range and the pixel and is emitted to the other side of the display panel (display panel 30).

Further, the display device 1 performs blurring when a pixel (pixel 48) is controlled to transmit light according to an input image signal (for example, an input signal IP) and the predetermined condition is not satisfied. A dimming pixel (for dimming) that does not form a range and is located at a position overlapping with the pixel on a straight line (for example, a straight line along the Z direction) along the opposing direction between the display panel and the dimming panel (the dimming panel 80). The light pixel 148) is controlled to transmit light, and the light from the light source (light source device 50) passes through the dimming pixel and the pixel and is emitted to the other side of the display panel (display panel 30). .

The predetermined condition is that a pixel (pixel 48) that is controlled to transmit light is from the outer edge of a display area (display area OA) in which a plurality of pixels (pixels 48) are provided in the display panel (display panel 30). The distance is more than a predetermined distance. The predetermined distance may be determined by the number of pixels (pixels 48) counted from the ends in the X and Y directions, for example, like the value of D described above, or may be determined by the distance from the outer edge of the display area. It may be set as the value shown. When the value indicating the distance is determined, information indicating in advance which pixels (pixels 48) are within the range of the value indicating the distance from the outer edge is held by the display device (display device 1).

Therefore, the display device 1 lights up in white according to the input image signal (for example, the input value (Ic) of (R, G, B) = (255, 255, 255) included in the input signal IP). When a predetermined condition is satisfied, a blurring process is applied in which the plurality of dimming pixels 148 transmit light, and the plurality of pixels 48 to which the blurring process is applied are A blurred range (for example, blurred range BWA1, etc.) that includes the dimming pixels is formed, and light from the light source device 50 passes through the blurred range and the pixels 48 and is emitted to the other side of the display panel 30. do. The predetermined condition here means that a pixel (pixel 48) that is controlled to transmit light, that is, a pixel 48 that is controlled to light up in white, is present in a plurality of pixels (pixel 48) on the display panel (display panel 30). ) is a predetermined distance or more away from the outer edge of the display area (display area OA) in which it is provided.

The display device 1 also includes a pixel 48 that is controlled to turn on in white according to an input image signal (for example, (R, G, B) = (255, 255, 255) included in the input signal IP). If this occurs and the predetermined condition is not satisfied, the blurred range is not formed and overlaps with the pixel 48 on a straight line (for example, a straight line along the Z direction) along the direction in which the display panel 30 and the light control panel 80 face each other. The dimming pixel 148 at the position is controlled to transmit light, and the light from the light source device 50 passes through the dimming pixel 148 and the pixel 48 and is emitted to the other side of the display panel 30. The predetermined condition is that a pixel (pixel 48) that is controlled to transmit light, that is, a pixel 48 that is controlled to light up in white, is a plurality of pixels (pixel 48) on the display panel (display panel 30). is located at least a predetermined distance from the outer edge of the display area (display area OA) in which it is provided.

According to this display device (display device 1), the contrast of the image can be further enhanced by forming the blurred range. Moreover, the above-mentioned double image and image chipping can be suppressed. Furthermore, by preventing the formation of a blurred range within a range that is no more than a predetermined distance from the outer edge of the display area (display area OA) in which a plurality of pixels (pixels 48) are provided, unintended light leakage can be prevented from occurring at the outer edge and the outer edge. It is possible to suppress the output of images that appear to be occurring in the vicinity. Therefore, according to the display device, it is possible to achieve both higher image contrast and suppression of output of an image that appears to have unintended light leakage occurring at and near the outer edge.

Furthermore, if the pixel (pixel 48) that is controlled to turn on in white is adjacent to the outer edge of the display area (display area OA), the above-mentioned predetermined condition does not hold. This makes it possible to more reliably suppress the output of an image in which unintended light leakage appears to be occurring at and around the outer edge.

Further, information indicating the predetermined distance is set in advance in a register (register 16). By setting information in the register more appropriately, it is possible to more reliably suppress the output of an image in which unintended light leakage appears to be occurring at and around the outer edge.

In addition, an imaging device (imaging device 90) whose imaging range (imaging range AoV) includes the space where the display panel (display panel 30) faces, and a user's viewpoint (for example, viewpoint E) based on the captured image by the imaging device are also provided. is determined to be within a predetermined range, even if the pixel (pixel 48) for which the above-mentioned predetermined condition is not satisfied is controlled to turn on white, multiple dimming pixels (pixel 48) are controlled to turn on in white. A blurring process is applied so that the light control pixels 148) transmit light, and a blurring range is formed that includes a plurality of light control pixels (light control pixels 148) to which the light source is applied. Light from the light source device 50 passes through the blurred range and the pixel and is emitted to the other side of the display panel. As a result, when the pixel 48 located near the outer edge of the display area OA is substantially viewed from the front by the user, the pixel 48 that is not likely to be viewed as if it were a light leak due to the front view is By applying blurring processing to the surrounding dimming pixels 148 from the front viewpoint, the contrast of the image can be further enhanced.

Note that in the embodiment, the blurring range wid described with reference to FIG. 6 is applied to both the X direction and the Y direction, but it may be applied to only one of them. Also, in the direction perpendicular to the Z direction and intersecting the X and Y directions, a blur range such as the blur range wid is set using the same concept as the X and Y directions, and the pixel of interest and reference The relationship with pixels may be determined and held in the 2d-LUT 1414.

In addition, other effects brought about by the aspects described in this embodiment that are obvious from the description in this specification or that can be appropriately conceived by those skilled in the art are naturally understood to be brought about by the present disclosure. .

1 Display device 30 Display panel 48 Pixel 50 Light source device 80 Light control panel 90 Imaging device 148 Pixel for light control

Claims (4)

a display panel including a plurality of pixels;
a light control panel arranged to face the display panel on one side of the display panel and including a plurality of light control pixels;
a light source that emits light directed from the light control panel side toward the display panel side;
Equipped with
When the pixels are controlled to turn on in white according to an input image signal and a predetermined condition is satisfied, a blurring process is applied in which the plurality of dimming pixels transmit light. , a blurring range including a plurality of the dimming pixels to which the blurring process is applied is formed, and light from the light source passes through the blurring range and the pixels to the other side of the display panel. Emits,
When the pixel is controlled to turn on in white according to an input image signal and the predetermined condition is not satisfied, the blur range is not formed and the display panel and the dimming panel are opposed to each other. The dimming pixel located at a position overlapping with the pixel on a straight line along the direction is controlled to transmit light, and the light from the light source passes through the dimming pixel and the pixel, and is transmitted to other parts of the display panel. Emits to the surface side,
The predetermined condition is satisfied when the pixel that is controlled to turn on in white is separated from an outer edge of a display area in which the plurality of pixels are provided in the display panel by a predetermined distance or more;
Display device. If the pixel that is controlled to turn on in white is adjacent to the outer edge, the predetermined condition does not hold;
The display device according to claim 1. Information indicating the predetermined distance is set in a register in advance,
The display device according to claim 1 or 2. an imaging device whose imaging range includes a space where the other side of the display panel faces;
If the user's viewpoint is determined to be within a predetermined range based on the image captured by the imaging device, the pixels for which the predetermined condition is not satisfied may be controlled to turn on in white; A blurring process is applied such that the dimming pixels transmit light, and a blurring range is formed that includes a plurality of the dimming pixels to which the blurring process is applied, and the light from the light source is transmits through the blurred range and the pixel and exits to the other side of the display panel,
A display device according to any one of claims 1 to 3.

Images